[Btrfs-devel] Initial Planning document for multiple device
support
Chris Mason
chris.mason at oracle.com
Tue Jan 22 06:01:50 PST 2008
On Tuesday 22 January 2008, sftf wrote:
> CM>
> http://oss.oracle.com/projects/btrfs/dist/documentation/btrfs-volumes.html
>
> Allocation Record is similar to LVM's physical extent (PE)
Allocation record is a somewhat generic term. But, devices will have trees
recording which space is used, and in that sense it is similar to a PE
> Storage Chunk is similar to LVM's logical extent (LE)
Yes.
> Storage Chunk1+Storage Chunk2+Storage Chunk3+... is similar to LVM's volume
> group (VG)
>
> And filesystem use aggregation of Storage Chunks directly to store metadata
> and data on them.
Yes.
-chris
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